I own a 1990 f150 xlt lariat the engine it has is a 5.0 302 engine with the efi electronic fuel ejection im a first time truck owner so i dont know what oil do i need to use the car says to use unleaded fuel i guess any unleaded fuel would work also any bit of advice would help thank you

 

*heads-up* You've posted in the 2009 - 2014 F150 formum - more appropriate/pertinent would be » 1987 - 1996 F150 & Larger F-Series Trucks «

Also ...

Put your complete vehicle information (year, model, cab, trim, engine, wheelbase, _x4 drive, mileage, modifications, etc., etc.) in your signature. *Eliminates playing 20 questions when/if a post is made pertaining to your vehicle.
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As for oil ... 5W30 any quality brand will do. And for oil filter (FL-1A), ONLY USE Motorcraft -or- WIX, and NAPA GOLD | SLIVER (which are made by WIX)
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Oil would be 5w-30 6.0qts or 5.7L with filter. Oil change interval is 5000 miles.
A fuels are unleaded now. 87 octane or regular gas should be good.
If you don't have one you should find an owners manual for your truck.

 

Im guessing the wheel base is some where from 116 inch and 130 i dont know exactly its a super cab 1990 ford f150 with the long bed
And the trim level is a xlt lariat also i found out what oil to use

 

Its a 2 wheel drive truck its a automatic not a manual i dont think it has had any modifications
it has 35000 miles on the truck but i heard the people who owned it before me had put a new transmission in it dont really know exactly what so 35000 new miles on the truck other than that i dont know about the miles on it they could have put a different engine in it for all i know it doesn't look like a truck with 35000 miles on it its old and has rust in places i dont know the history of the truck like i should

 

Sorry im in the wrong forum i didnt realize i was in the 2009-2014 ford forum

 

I also wondered quite a few years ago if say 5w30 could be used consistantly (even 10/30)
I was always told 5w20 was spec'd due to the tighter tolerances of these newer engines ....
So I stuck with the spec's until recently then I changed to 5w30 on my higher mileage 2013...
Mr Lube that does my service immediately slashed across my invoice " No Warranty "....
However not to be fooled my ++ over 300,000 km truck warranty ceased to exist a few years ago & seems to run just fine on 5000km oil changes...

 

I use 5W-30 oil, since that's what the Ford manual calls for in 2014 3.5EB engine. On the other hand, Fords calls for 5W-20 in my 1.5L EB in my 2018 Fusion.

 

delete, delete.

 

I have a few quarts 5w20, but I run 5w30 in my 5.4 3v, my 4,6 3v, and my 2 4.6 2valve motors.

The 5w20 76 Synthetic Blend that I have is some left over from my pre retirement career use in a assigned Crown Vic PI, and even the Dept. switched over to 5w30 after Ford sent a letter out advising it. I just use it as bar oil, etc.

In my '77, I'll use up some 10w30 and 20w50 I have from long long ago. I bet it'll like that Delo 400 15w40 too. I'll also use the Delo in my Wheel Horse. I bought it when I had two Gold Wings, great shifting there as the trans use same lube as engine.